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arXiv 1409.1970math.CO
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有限素数阶循环群上不可分裂的极小零和序列

On the unsplittable minimal zero-sum sequences over finite cyclic groups of prime order

Jiangtao Peng, Fang Sun

摘要:

设$p > 155$是素数,$G$是阶为$p$的循环群.令$S$是具有$G$上的元素的最小零和序列,即,$S$中元素的和为零,但$S$的真非平凡子序列的和不为零。如果$S$和$x,y \in G$中不存在$g$,使得$g=x+y$和$Sg^{-1}xy$也是最小零和序列,则称$S$是不可分裂的.本文证明了:若$S$是长度为$|S|= \frac{p-1}{2}$的不可分裂的极小零和序列,则有$S=g^{\frac{p-11}{2}}(\frac{p+3}{2}g)^4(\frac{p-1}{2}g)$或$g^{\frac{p-7}{2}}(\frac{p+5}{2}g)^2(\frac{p-3}{2}g)$ .此外,如果$S$是具有$|S| \ge \frac{p-1}{2}$的最小零和序列,则$\ind(S) \leq 2$。

英文摘要:

Let $p > 155$ be a prime and let $G$ be a cyclic group of order $p$. Let $S$ be a minimal zero-sum sequence with elements over $G$, i.e., the sum of elements in $S$ is zero, but no proper nontrivial subsequence of $S$ has sum zero. We call $S$ is unsplittable, if there do not exist $g$ in $S$ and $x,y \in G$ such that $g=x+y$ and $Sg^{-1}xy$ is also a minimal zero-sum sequence. In this paper we show that if $S$ is an unsplittable minimal zero-sum sequence of length $|S|= \frac{p-1}{2}$, then $S=g^{\frac{p-11}{2}}(\frac{p+3}{2}g)^4(\frac{p-1}{2}g)$ or $g^{\frac{p-7}{2}}(\frac{p+5}{2}g)^2(\frac{p-3}{2}g)$. Furthermore, if $S$ is a minimal zero-sum sequence with $|S| \ge \frac{p-1}{2}$, then $\ind(S) \leq 2$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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